Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5983
Number of amino acids:251
Molecular Weight:29053.97 Da
Theoretical pI:7.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)62.39%
Cysteine CYS (C)62.39%
Glutamic Acid GLU (E)20.8%
Aspartic Acid ASP (D)20.8%
Glycine GLY (G)62.39%
Phynylalanine PHE (F)135.18%
Isoleucine ILE (I)155.98%
Histidine HIS (H)51.99%
Lysine LYS (K)31.2%
Methionine MET (M)72.79%
Leucine LEU (L)176.77%
Asparagine ASN (N)31.2%
Glutamine GLN (Q)9035.86%
Proline PRO (P)3915.54%
Serine SER (S)135.18%
Arginine ARG (R)10.4%
Threonine THR (T)93.59%
Tryptophan TRP (W)31.2%
Valine VAL (V)93.59%
Tyrosine TYR (Y)20.8%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1292
HydrogenH1987
NitrogenN363
OxygenO377
SulphurS13

FormulaC1292H1987N363O377S13
Total Number of Atoms:4032


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    19855
Absorption 0.1% (=1 g/l)    0.683,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19480
Absorption 0.1% (=1 g/l)    0.670,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 110.56

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.51, 24.30, 12.75]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:62.51
Grand average of hydropathicity (GRAVY):-0.85